EP2228787A3 - Light source driving apparatus - Google Patents

Light source driving apparatus Download PDF

Info

Publication number
EP2228787A3
EP2228787A3 EP20100156374 EP10156374A EP2228787A3 EP 2228787 A3 EP2228787 A3 EP 2228787A3 EP 20100156374 EP20100156374 EP 20100156374 EP 10156374 A EP10156374 A EP 10156374A EP 2228787 A3 EP2228787 A3 EP 2228787A3
Authority
EP
European Patent Office
Prior art keywords
light source
feedback
driving apparatus
source driving
power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20100156374
Other languages
German (de)
French (fr)
Other versions
EP2228787A2 (en
Inventor
Yong-Chan Keh
Byeong-Hoon Park
Yong-Kwan Kim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of EP2228787A2 publication Critical patent/EP2228787A2/en
Publication of EP2228787A3 publication Critical patent/EP2228787A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Semiconductor Lasers (AREA)

Abstract

A light source driving apparatus is disclosed which includes a power supply including a power supp ly terminal connected to a first path through which a power source is supplied to a light source and including a feedback terminal for receiving a feedback of the power source supplied to the light source, a feedback resistor con nected to the feedback terminal, and a current divider for branching a current flowing into the first path and supplying the branched current to the feedback resistor.
EP20100156374 2009-03-13 2010-03-12 Light source driving apparatus Withdrawn EP2228787A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090021803A KR20100103262A (en) 2009-03-13 2009-03-13 Driver for light source

Publications (2)

Publication Number Publication Date
EP2228787A2 EP2228787A2 (en) 2010-09-15
EP2228787A3 true EP2228787A3 (en) 2011-08-17

Family

ID=42288922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100156374 Withdrawn EP2228787A3 (en) 2009-03-13 2010-03-12 Light source driving apparatus

Country Status (3)

Country Link
US (1) US8633654B2 (en)
EP (1) EP2228787A3 (en)
KR (1) KR20100103262A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102011068B1 (en) * 2011-05-06 2019-08-14 이동일 LED Driving Apparatus and Driving Method Using the Same
CN102821510B (en) * 2011-06-08 2014-11-05 聚积科技股份有限公司 AC/DC dual-purpose LED drive circuit
CN102821509A (en) * 2011-06-08 2012-12-12 聚积科技股份有限公司 AC/DC dual-purpose LED drive circuit
US9939619B1 (en) * 2014-07-24 2018-04-10 Hoyos Integrity Corporation Optical stack for panoramic optical device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001356829A (en) * 2000-06-14 2001-12-26 Fujitsu Ltd Current mirror circuit
JP2004039289A (en) * 2002-06-28 2004-02-05 Matsushita Electric Works Ltd Lighting device
WO2006064841A1 (en) * 2004-12-14 2006-06-22 Matsushita Electric Industrial Co., Ltd. Semiconductor circuit for driving light emitting diode, and light emitting diode driving apparatus
US20080150449A1 (en) * 2006-12-26 2008-06-26 Beyond Innovation Technology Co., Ltd. Control circuits for dimming control
US20080179498A1 (en) * 2007-01-31 2008-07-31 Takayuki Shimizu Illuminance sensor and light control apparatus

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100628718B1 (en) * 2005-02-26 2006-09-28 삼성전자주식회사 Led driver
KR20080021341A (en) * 2006-09-04 2008-03-07 삼성전자주식회사 Display apparatus and brightness control method thereof
KR20080073464A (en) * 2007-02-06 2008-08-11 삼성전자주식회사 Apparatus for driving of light source and display device having the same and method of the driving
US7888888B2 (en) * 2007-07-11 2011-02-15 Industrial Technology Research Institute Light source apparatus and driving apparatus thereof
KR101119261B1 (en) * 2009-01-14 2012-03-16 삼성전자주식회사 Driver for light source
US20120074865A1 (en) * 2010-09-26 2012-03-29 Chicony Power Technology Co., Ltd. Light emitting diode driving device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001356829A (en) * 2000-06-14 2001-12-26 Fujitsu Ltd Current mirror circuit
JP2004039289A (en) * 2002-06-28 2004-02-05 Matsushita Electric Works Ltd Lighting device
WO2006064841A1 (en) * 2004-12-14 2006-06-22 Matsushita Electric Industrial Co., Ltd. Semiconductor circuit for driving light emitting diode, and light emitting diode driving apparatus
US20090224686A1 (en) * 2004-12-14 2009-09-10 Matsushita Electric Industrial Co., Ltd. Semiconductor circuit for driving light emitting diode, and light emitting diode driving apparatus
US20080150449A1 (en) * 2006-12-26 2008-06-26 Beyond Innovation Technology Co., Ltd. Control circuits for dimming control
US20080179498A1 (en) * 2007-01-31 2008-07-31 Takayuki Shimizu Illuminance sensor and light control apparatus

Also Published As

Publication number Publication date
US8633654B2 (en) 2014-01-21
US20100231137A1 (en) 2010-09-16
EP2228787A2 (en) 2010-09-15
KR20100103262A (en) 2010-09-27

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Effective date: 20120123

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Owner name: SAMSUNG ELECTRONICS CO., LTD.

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Effective date: 20161001